diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 3f33e4d..7a7cbaa 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -14,7 +14,7 @@ jobs:
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.5
+          ruby-version: 2.7
           bundler-cache: true
       - name: Run rubocop
         if: github.event_name != 'push'
@@ -26,7 +26,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: [2.5, 2.7]
+        ruby-version: ['2.7', '3.0', '3.1']
     steps:
       - run: sudo apt-get update
       - run: sudo apt-get install build-essential libsystemd-dev
diff --git a/.rubocop.yml b/.rubocop.yml
index b89a735..b5bca8e 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -6,7 +6,7 @@ require:
   - rubocop-rake
 
 AllCops:
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: '2.7'
 
 # Don't enforce documentation
 Style/Documentation:
diff --git a/smart_proxy_dynflow.gemspec b/smart_proxy_dynflow.gemspec
index 46759f3..e1cd96e 100644
--- a/smart_proxy_dynflow.gemspec
+++ b/smart_proxy_dynflow.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.license = 'GPL-3.0'
 
-  gem.required_ruby_version = '>= 2.5'
+  gem.required_ruby_version = '>= 2.7', '< 4'
 
   gem.add_runtime_dependency('dynflow', "~> 1.6")
   gem.add_runtime_dependency('rest-client')